Nouns

(n)numeral, numbera symbol used to represent a number“he learned to write the numerals before he went to school”
(n)numerala word expressing a number.“Numerals may be attributive, as in two dogs, or pronominal, as in I saw two (of them).”

Adjectives

(a)numeral, numerical, numericof or relating to or denoting numbers“a numeral adjective”, “numerical order”, “a numeric symbol”